Notes

• NOTE 1 Examples include: - PCO2, stands for partial pressure of carbon dioxide, - PH2O, stands for water vapour partial pressure.
• NOTE 2 To calculate a partial pressure, the fraction of the constituent is multiplied by the total pressure. For example, the partial pressure of oxygen on Earth is: PO2 = 0,21 x 1,013 x 106 Pa = 0,213 x 106 Pa.
• NOTE 3 Abbreviation for partial pressure is P followed by the chemical formula of the constituent.